Sudarshan Gurjar is teaching live on Unacademy Plus
About me: SUDARSHAN GURAR Verified Educator & Plus Educator at Unacademy Mentored more than 10,000 students. Teaching Geography since 2013 (UPSC category). A Geography Learner. COURSES AVAlILABLE ON PATFORM Y unacademy Geography through Maps. Current Affairs & In-depth Editorial Analysis. Special Current Affairs on Madhya Pradesh & many more PLUS CoURSES Current Affairs & In-depth Editorial Analysis.
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UPSC PLUS COURSE unacademy Sudarshan Gurjar Geography & Current of Environment Issues unacademy
Central Asia Floristic Pine-Oak Southwest China Japan rano & Micronesia & Sri LankaBurma East Horn of Africa Cerrado Guinean Forests of West Africa slands Tumbes Choco and the Indian Ocean New Atlantic Forest Coastal Forests of Eastern Africa Australia Cape Floristic Maputaland Region Pondoland-Albany New Valdivian Forests Hotspots
BIODIVERSITY HOTSPOT The concept of biodiversity hotspots was given by Norman Myers. A biodiversity hotspot is a biogeographic region with a significant reservoir of biodiversity that is threatened with destruction. These hot spots which cover less than 2% of the world's land area are found to have about 50% of the terrestrial biodiversity. Criteria for determining hot-spots Contain at least 1,500 species of vascular plants (0.5 percent of the world's total) as endemics (species found nowhere else on Earth).
There are 35 such hot spots of biodiversity on a global level. Plants: The hotspots hoid at least 150,000 endemicplant species, 50 percent of the world's total vascular plants. Degree of threat, which is measured in terms of Habitat loss: Have lost at least 70 percent of its original habitat.
Vegetation: The biodiversity hotspots once stretched across 15.7 percent of the Earth's land surface, however 86 percent of the hotspots' original habitat has already been destroyed. Today, the intact remnants of the hotspots now cover only 2.3 percent of the Earth's land surface.